<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form>
        <fieldset><legend>登录</legend>
        <p>账号:<input type="text"></p>
        <p>密码:<input type="password"></p>
        <input type="submit" value="登录">
        </fieldset></form>
</body>
</html>